Dick Lugar through the years

Sen. Dick Lugar of Indiana faces a tough challenge Tuesday, with the possibility of becoming just the sixth GOP senator in more than 30 years to be toppled in a primary. Here's a look at the career of the six-term Republican senator and one-time presidential hopeful in pictures.

New Hampshire

Lugar waves to supporters at his election night party with his wife Char in Manchester, N.H., in February 1996. Lugar placed a distant fifth in the New Hampshire primary.
(Photo: AP Photo | Date: Feb. 20, 1996)